Category Archives: EGS/ EFS/ EFT

all kinds of FE, GE, 10GE cards

Cautions for Unavailable Services After N2EFT8 & N2EFT8A board is Connected to Third-Party Equipment

Abstract: Since the Generic Framing Procedure (GFP) for the N2EFT8/ N2EFT8A board strictly verifies the GFP frames from third-party huawei transmission equipment after the board is connected to third-party , all frames are discarded and services are unavailable. [Problem Description] Trigger conditions: 1. The following three conditions are met during deployment: (1) The NE software is… Read More »


Alarm of Optical Module’s on PEX2&PEX1 and EX2 Boards on H-MSTP Equipment

Summary: The LASER_MOD_ERR alarm is reported when some vendors’ optical modules are used on different PCB versions on SSN1PEX2, SSN2PEX1, and TNN1EX2 boards. [Problem Description] Trigger condition: Scenario 1: The optical modules of specific models report the LASER_MOD_ERR alarm. If the equipment version is V200R012C01SPH102 (board software version 6.04) or earlier and the board is… Read More »

Have You Ever Met Service Interruption of ET1 Board on Metro 1000V3 upon Power-off Reset

Abstract After the network connectivity element (NE) is powered off, the tag of the VCTRUNK port on the ET1 board is lost. As a result, data services are interrupted. Trigger conditions The tag of the VCTRUNK port on the ET1 board is modified, and then the NE is powered off. Fault symptoms After the NE… Read More »

Did you ever meet NO_BD_SOFT Alarm on your EMS4 and EGS4 borads

Summary: The Micron memories on some SSN1EMS4 and SSN1EGS4 boards have processing issues, which cause the boards to report NO_BD_SOFT alarms during running. [Problem Description] Trigger conditions: This issue is occasionally triggered after the board (listed in List of SSN1EGS4 Boards for Rectification and List of SSN1EMS4 Boards for Rectification) is powered on and goes… Read More »

Do you know the limitaiton of Huawei N3EAS2

  Site engineer found the N3EAS2 can only show 17 VCTRUNCK in Ethernet interface But there are 34 VCTRUNCK in link Aggregation location.   NMS version: V100R006C02SPC200   OSN3500 version: V1R10C02SPC100 The following is snap of just showing 17 VCTRUNCK: The following is the snap of showing 34 VCTRUNCK in link Aggregation location: 1.Query the V1R10C02SPC100 product document… Read More »

FAQ- The Situation of EOS board transparently transmit the LACP packet

It need transparently transmit the LACP packet when MSTP device interconnect to DataCome or wireless. But mostly the LACP packet cannot transparently transmit using EOS board. The article will tell story. 1.For the transparently transmit board, it use the SD8820 chip, it need disable the function of port detecting, then the LACP can transparently transmit.… Read More »

Port utilization and Port bandwidth utilization can’t be showed in the RMON by PEX1 board

SSND1PEX2000 is a  2-port 10G Ethernet Switching Processing Board; Part Number03020MTE. SSND1PEX2000 is available in one functional version, namely, N1. 【Problem Summary】PEX1 board cannot show “port utilization” and “port bandwidth utilization” in the RMON , The OSN 3500 version is V2R11C02SPC103.【Problem Details】Please refer the follow picture. 1, There are two reasons may cause this problem, NMS problem or… Read More »

Much Virtual concatenation delay lead to EoS service interrupt

Firstly, Eth service is running on MSTP link with virtual concatenation. And it’s configured with LCAS. Customer complains the link interrupts occasionally for a short time.Alarm FCS_ERR,ALM_GFP_dLFD report at the same time. The issue happens 8 times in one month.Topology as attached. Version of equipment and boards as below:OSN3500: V100R008C01B01C EGS4: 1.17 OSN8800: V100R006C01 EGSH:… Read More »

Wrong File Selected Lead to Data Center do not Recongnize N3EFS4 Board

The SSND00EFS411 is a 4-port 10M/100M Fast Ethernet Processing Board with LAN Switch. Part Number: 03020KHU. Compatibility: OSN7500, OSN 3500, OSN 2500, OSN 1500. SSND00EFS411 is available in three functional versions, namely, N1, N2 and N3. The difference between the three versions is their different maximum uplink bandwidths. The N1EFS4 and N2EFS4 are discontinued. Some customer added N2EFS4 board recently to slot #4… Read More »

Solution ——N4EGS4 activation timeout when OSN3500 use simulation package loading from V1R10 to V1R9

The SSN1EGS4 is a 4-port Gigabit Ethernet Switching Processing Board with Part Number03051249.The SSN1EGS4 is available in three functional versions, namely, N1, N3 and N4.  Here is the solution of the problem: 【Problem Summary】OSN3500 NE degrade fail(V1R10 > V1R9) 【Problem Details】OSN3500 use simulation package loading from V1R10C03SPC203 down V1R9SPC200, N4EGS4 board fails to start after activation, leading to activation of overtime 1.Collecting downgrade DC log, see DC on the data board made​​: cfg-reset-board after a soft reset command, The board online but the state fails. You can judge the board did… Read More »